1. No, the amber = only changes if you change your flaps.
Conf0, amber= is at 230kt.
Conf1, amber= is at 200kt.
Conf2, amber= is at 185kt.
Conf3, amber= is at 177kt.
ConfF, amber= disappears.
These are true whether you are extending flaps, retracting flaps, or flying without touching flaps.
2. Yes.
3. Need a bit more information. What altitude have you set on FCU? Are you in ALT mode or DES mode? And what altitude are you at?